Equation Icon  ′ ′ α′ β′ α′ β′ γ′[ ( ′ ′ ′ ′ d) ′ 2 ] Uαβα β;γu u = g (αg β)g[γ − r R α0γ0 + R α0γ] dΩ uβ + 𝒪 (r ) , (502 ) U αβα′β′;γ′uα′uβ′uγ′ = g α′gβ′ rR α′0d0Ωdu β′ + 𝒪 (r2) , (503 ) (α β)